EP0281747A3 - Light curtain - Google Patents

Light curtain Download PDF

Info

Publication number
EP0281747A3
EP0281747A3 EP88101121A EP88101121A EP0281747A3 EP 0281747 A3 EP0281747 A3 EP 0281747A3 EP 88101121 A EP88101121 A EP 88101121A EP 88101121 A EP88101121 A EP 88101121A EP 0281747 A3 EP0281747 A3 EP 0281747A3
Authority
EP
European Patent Office
Prior art keywords
concave mirror
focal plane
light curtain
light
focal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP88101121A
Other languages
German (de)
French (fr)
Other versions
EP0281747A2 (en
Inventor
Karl Dr. Pietzsch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Erwin Sick GmbH Optik Elektronik
Original Assignee
Erwin Sick GmbH Optik Elektronik
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Erwin Sick GmbH Optik Elektronik filed Critical Erwin Sick GmbH Optik Elektronik
Publication of EP0281747A2 publication Critical patent/EP0281747A2/en
Publication of EP0281747A3 publication Critical patent/EP0281747A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V8/00—Prospecting or detecting by optical means
    • G01V8/10—Detecting, e.g. by using light barriers
    • G01V8/20—Detecting, e.g. by using light barriers using multiple transmitters or receivers
    • G01V8/22—Detecting, e.g. by using light barriers using multiple transmitters or receivers using reflectors

Landscapes

  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Mechanical Optical Scanning Systems (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

Ein Lichtvorhang weist eine von einer Elektronik (22) periodisch durchgetastetes Leucht- oder Laser-Dioden­ zeile (11) auf, die durch ein Objektiv (12) und einen Hohlspiegel (14) telezentrisch vergrößert in die Brenn­ ebene (15′) des Hohlspiegels (14) abgebildet wird. Ein im Abstand seiner Brennweite von der Brennebene (15′) auf der entgegengesetzten Seite der Brennebene (15′) wie der Hohlspiegel (14) angeordnetes streifenförmiges Linsenraster (16) schickt kollimierte Lichtbündel (17) in die Überwachungsstrecke (18). A light curtain has one of an electronics (22) periodically scanned light or laser diodes line (11) through a lens (12) and one Concave mirror (14) telecentrically enlarged in the focal plane (15 ') of the concave mirror (14) is shown. A at a distance of its focal length from the focal plane (15 ′) on the opposite side of the focal plane (15 ′) like the concave mirror (14) arranged strip-shaped Lenticular grid (16) sends collimated light beams (17) in the monitoring section (18).

EP88101121A 1987-03-12 1988-01-26 Light curtain Withdrawn EP0281747A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3707978 1987-03-12
DE3707978A DE3707978C1 (en) 1987-03-12 1987-03-12 Light curtain

Publications (2)

Publication Number Publication Date
EP0281747A2 EP0281747A2 (en) 1988-09-14
EP0281747A3 true EP0281747A3 (en) 1989-11-29

Family

ID=6322875

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88101121A Withdrawn EP0281747A3 (en) 1987-03-12 1988-01-26 Light curtain

Country Status (4)

Country Link
US (1) US4864121A (en)
EP (1) EP0281747A3 (en)
JP (1) JPH01118795A (en)
DE (1) DE3707978C1 (en)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8828202D0 (en) * 1988-12-02 1989-01-05 Laser & Aerospace Consultants Laser security system
JPH03277990A (en) * 1990-02-20 1991-12-09 Fuji Electric Co Ltd Photoelectric switch for detecting minute matter
FR2659190B1 (en) * 1990-03-12 1992-06-19 Serres Patrick LASER BARRIER.
US5404008A (en) * 1993-07-16 1995-04-04 Rockwell International Corporation Control system for detecting intrusion of a light curtain
WO1995007471A1 (en) * 1993-09-07 1995-03-16 Laserscore, Inc. Method and apparatus for detecting the presence and location of an object in a field
US5565686A (en) * 1993-09-07 1996-10-15 Laser Score, Inc. Method and apparatus for detecting the presence and location of objects in a field via scanned optical beams
US5539198A (en) * 1993-09-28 1996-07-23 Rockwell International Corporation Uniform sensitivity light curtain
US6384402B1 (en) * 1998-04-29 2002-05-07 Automated Merchandising Systems Optical vend-sensing system for control of vending machine
US6166371A (en) * 1999-04-30 2000-12-26 Beckman Coulter, Inc. Diffuse reflective light curtain system
AU2001263460A1 (en) 2000-05-26 2001-12-11 Mark R. Brent Perimetric detection system and automated container
US6974948B1 (en) 2000-05-26 2005-12-13 Brent Mark R Perimetric detection system
US6968073B1 (en) 2001-04-24 2005-11-22 Automotive Systems Laboratory, Inc. Occupant detection system
JP2008518195A (en) * 2003-10-03 2008-05-29 オートモーティブ システムズ ラボラトリー インコーポレーテッド Occupant detection system
WO2006017183A2 (en) * 2004-07-09 2006-02-16 Automated Merchandising Systems Inc. Optical vend-sensing system for control of vending machine
US20080217348A1 (en) * 2006-10-23 2008-09-11 Automated Vending Technology, Inc. Vend sensing system
US8169596B2 (en) 2009-08-17 2012-05-01 Seegrid Corporation System and method using a multi-plane curtain
DE102017116492B4 (en) * 2017-07-21 2020-06-04 Sick Ag Method for producing an optoelectronic sensor
US11474254B2 (en) 2017-11-07 2022-10-18 Piaggio Fast Forward Inc. Multi-axes scanning system from single-axis scanner
JP6652585B2 (en) * 2018-03-22 2020-02-26 株式会社アマダホールディングス Processing machine safety device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1297004B (en) * 1964-06-27 1969-06-04 Sick Erwin Photoelectric barrier
DE2247053A1 (en) * 1972-09-26 1974-05-22 Sick Optik Elektronik Erwin LIGHT BARRIER GRILLE
EP0005854A1 (en) * 1978-06-02 1979-12-12 Erwin Sick GmbH Optik-Elektronik Apparatus for facilitating alignment of a group of cyclically switched light transmitters or receivers with a single light receiver or transmitter

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3810148A (en) * 1972-07-06 1974-05-07 Kewp Inc Electronic line indicator apparatus
IT1161307B (en) * 1978-08-25 1987-03-18 Datalogic Spa PHOTOELECTRIC BARRIER IN PARTICULAR SAFETY DEVICE
DE2851444C2 (en) * 1978-11-28 1983-05-26 Erwin Sick Gmbh Optik-Elektronik, 7808 Waldkirch Light curtain
DE2934554C2 (en) * 1979-08-27 1984-08-02 Erwin Sick Gmbh Optik-Elektronik, 7808 Waldkirch Optoelectronic monitoring device.
GB2158232B (en) * 1984-04-25 1987-11-18 Matsushita Electric Works Ltd Object detecting apparatus including photosensors for restricted detection area
DE3601516A1 (en) * 1986-01-20 1987-07-23 Agie Ag Ind Elektronik PHOTOELECTRIC BARRIER

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1297004B (en) * 1964-06-27 1969-06-04 Sick Erwin Photoelectric barrier
DE2247053A1 (en) * 1972-09-26 1974-05-22 Sick Optik Elektronik Erwin LIGHT BARRIER GRILLE
EP0005854A1 (en) * 1978-06-02 1979-12-12 Erwin Sick GmbH Optik-Elektronik Apparatus for facilitating alignment of a group of cyclically switched light transmitters or receivers with a single light receiver or transmitter

Also Published As

Publication number Publication date
US4864121A (en) 1989-09-05
DE3707978C1 (en) 1988-03-17
EP0281747A2 (en) 1988-09-14
JPH01118795A (en) 1989-05-11

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